package com.vpclub.condition;

import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.env.Environment;
import org.springframework.core.type.AnnotatedTypeMetadata;

/**
 * @author : leimingchao
 * @Description: 判断操作系统是否linux
 * @date Date : 2021年06月12日 22:33
 */
public class LinuxCondition implements Condition {

    /**
     * ConditionContext:判断条件能使用的上下文（环境）
     * AnnotatedTypeMetadata:注释信息
     * @param context
     * @param metadata
     * @return
     */
    @Override
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        //是否linux系统
        //1.能获取到ioc使用的beanFactory
        ConfigurableListableBeanFactory beanFactory = context.getBeanFactory();
        //2.获取类加载器
        ClassLoader classLoader = context.getClassLoader();
        //3.获取当前环境信息
        Environment environment = context.getEnvironment();
        //4.获取到bean定义的注册类
        BeanDefinitionRegistry registry = context.getRegistry();

        //判断容器中bean注册情况，也可以给容器中注册bean
        boolean person = registry.containsBeanDefinition("person");

        String property = environment.getProperty("os.name");
        if (property.contains("linux")) {
            return true;
        }
        return false;
    }
}
